All North American (NA) worlds will be brought down for maintenance at approximately 12.30 p.m. PDT (2.30 p.m. CDT, 8.30 p.m. BST).
This is one of the stages in our insistent work of sorting out the latency problems many have been experiencing. We will be using this maintenance to apply a number of tweaks and updates to our game servers.
We do not have an estimated length for the maintenance, but will do our best to get the game back up and running as quickly as possible.
Thank you for your patience.